Add WPT that scaleResolutionDownTo is optional on inactive encodings.
This adds JS level test coverage for this WebRTC bug fix:
https://webrtc-review.googlesource.com/c/src/+/366522
Bug: chromium:375048792
Change-Id: Ib633e8435747eaa0757eb62bc74d6d63c9bbd8dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5953396
Commit-Queue: Henrik Boström hbos@chromium.org
Auto-Submit: Henrik Boström hbos@chromium.org
Reviewed-by: Harald Alvestrand hta@chromium.org
Cr-Commit-Position: refs/heads/main@{#1373253}